Some funsters might not recognize Adam as the the author of the spectacular Life configuration that computes pi in decimal (and even displays the digits). Maybe someday he can explain to us if and how he solved the ".999 problem", i.e., the absence of an a priori bound on the number of possible consecutive 9s or 0s, which, until they cease, leave the preceding digit unresolved (or equivalently, provoke negative or oversize "apology digits" following the premature estimate of an earlier one). The corresponding problem with continued fraction output is the unboundedness of a term. Both Neil's and my calculations simply delayed the output a few terms with a "smoother", but were capable of non-canonical outputs (0 or negative terms) following a term of truly newsworthy size. A continued fraction algorithm restricted to positive integer outputs would simply freeze on 1 2 2 2 ... times 1 2 2 2 ... . --rwg